A:Answer Not necessarily. A "new PC" with Windows 7 (unless you selected the downgrade) doesn't sound new at all. In other words, the PC itself may be new but lack the latest technology. Your hard drive and motherboard can also create a bottleneck. Check these things out with whoever / wherever you bought your PC to be certain.
If you can, try it on a USB-C port or newer PC and see if it's still slow.